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When it comes to germs, the gold standard for grossness is the bacteria brewing in our bathrooms.

A variety of studies and reports over the years have put the average bacteria per square inch on a toilet seat somewhere between 50 and almost 300 for household potties and over 1,000 for the public varieties. Yet our own handheld electronics harbor even more bacteria than that.

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Smartphones Your smartphone is home to your photos, music, contacts, productivity apps and odds are at least one game featuring a bird, zombie, fruit or farm. Oh, and there's something else on your smartphone, too — loads of fecal coliforms. Joining the coliforms are Streptococcus, Staphylococcus aureus and a host of other -ococci.

Bacteriology students made imprints of their phones in Petri dishes, and after three days, they saw examples of many of the aforementioned bacteria — plus one particularly hairy case of Bacillius mycoides. It's really not surprising that the device that goes everywhere from public transportation to public restrooms to not-so-public germ repositories (aka our own homes) is a hot bed for bacteria.

Here are four more gadgets to rival any restroom when it comes to germs:

Tablets/e-readers — Just think of them as smartphones with fewer features and more surface area when it comes to the germ load tablets and e-readers pack. One iPad tested by British consumer magazine Which? found 600 units of Staphylococcus aureus alone.